Sökning: "long-term oxygen"

Visar resultat 11 - 15 av 201 avhandlingar innehållade orden long-term oxygen.

  1. 11. Long-Term Thermal Performance of Polyurethane-Insulated District Heating Pipes

    Författare :Maria E. Olsson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : The distribution of hot water in district heating pipes gives rise to energy losses. In order to minimise heat losses and maintain a high water temperature most district heating pipes produced today are insulated with rigid polyurethane foam. LÄS MER

  3. 12. Long-term performance of polymeric materials in nuclear power plants

    Författare :Payam Pourmand; Ulf W. Gedde; Sue Burnay; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; EPDM; thermal ageing; radiation ageing; portable NMR spectroscopy; modulus profiling; condition monitoring; plasticizer migration; Kemi; Chemistry;

    Sammanfattning : Access to energy is crucial for modern societies to function sustainably. In addition, nuclear power has for a long time been considered a reliable source of energy. However, the majority of nuclear power plants are reaching the end of their service lifetimes, and it is crucial to verify that every component can withstand the added service time. LÄS MER

  4. 13. From novice towards self-care expert : studies of self-care among persons using advanced medical technology at home

    Författare :Angelika Fex; Olle Söderhamn; Anna-Christina Ek; Britt-Marie Ternestedt; Högskolan Väst; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Home care services; Self care; Technology; medical; Dependent-care; Health; Hermeneutics; Home dialysis; Home ventilator; Long-term oxygen; Next of kin; Phenomenology; Transition; Egenvård; Medicinsk teknik; Nursing; Omvårdnad; Vårdvetenskap; Nursing science; MEDICINE;

    Sammanfattning : The use of advanced medical technology at home has increased in most industrialized countries. The overall aim of this thesis was to develop knowledge of self-care and transition and issues that influence daily life and health among persons using advanced medical technology at home. LÄS MER

  5. 14. Nocturnal enuresis and rapid maxillary expansion : – long-term effect, prognostic variables, respiration during sleep and quality of life

    Författare :Ingrid Jönson Ring; Bazargani Farhan; Tryggve Nevéus; Agneta Markström; Maria Ransjö; Uppsala universitet; []
    Nyckelord :Rapid maxillary expansion; nocturnal enuresis; sleep disordered breathing; respiration; polygraphic sleep recording; quality of life.; Medicinsk vetenskap; Medical Science;

    Sammanfattning : Background:The orthodontic technique rapid maxillary expansion (RME) has been reported to have a potentially curative effect on nocturnal enuresis (NE). The mechanism behind this is unknown but could possibly be due to placebo and/or effects on respiration during sleep. LÄS MER

  7. 15. Internal oxygen transport to below-ground parts: importance for emergent macrophytes

    Författare :Viveka Vretare Strand; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Växtekologi; Plant ecology; water depth; zonation; phenotypic plasticity; biomass allocation; pressurised ventilation; oxygen; Phragmites australis; emergent macrophytes; common reed; Hydrobiology; marine biology; aquatic ecology; limnology; Marinbiologi; limnologi; akvatisk ekologi; Ecology; Ekologi;

    Sammanfattning : This thesis examines factors regulating growth and distribution of emergent plants with focus on effects of oxygen supply to the roots. Greenhouse experiments revealed that P. australis acclimatizes to specific water depths with phenotypic plasticity. LÄS MER